Would she have any chance of being upgraded from assist character to playable character?

Lyn was good idea mentioned earlier in this thread and I liked the idea of adding her alot, hopefully she could have a chance.

Anyone else want to see Lyndis in Super Smash Bros 4?

would like to see her in the game and she is rather important,being the first lord of the first fe released outside japan and being the first independent female main character(at least before eliwood takes over in fe7)

But she is rather unimportant compared to ike and marth,so I think her chances are not that high,but still there

well she(or should I rather say they?) appeared in multiple games and they are more or less the main villain of the linked oracle game,so there is some justification for them.But overall I doubt they'll be included,as they only appear in the oracle games,if you link the two games(so people who can't do that won't know them) and even though they are most likely the most important boss in OoT aside ganon(dorf) himself(and maybe phantom ganon considering his reappearance in other games),they are still just one boss out of 8.

Speaking of female zelda characters,I think Impa might have chance.She appears in many games(maybe more than any other zelda-chara who doesn't wield a part of the triforce?) and was already mentioned in the manual of the nes-zelda games(and was originally planned as the true wielder of the triforce of power).Especially to notice is that she appeared in the two most recent zelda-games,so she should be rather well-known even to newer players and if shiek gets cut(which isn't that unlikely,since shiek is rather minor compared to almost any other character in brawl),she could take some of her moveset(or it could be possible,that she'll replace shiek,so that zelda and impa switch)

Impa could also be a alternate costume for Sheik since Impa is a Sheikah herself.

Why not put Twinrova in?

I was refering to the Twinrova from Ocarina of Time and she could also have a alternate costume that resembles a Gerudo because she looks like a Gerudo.

They don't have to include Koume and Kotake, I would just like to see Twinrova in Super Smash Bros 4 even if Koume and Kotake are not included with her.

I think koume and kotake would fit better as the standard character,with twinrova being their final smash.

The main reason against them is that they don't play very big roles.They are only a boss in OoT and while they are no regular boss(the only one with multiple phases and at least some kind of realation to the overall plot),but they have actually a very minor role.In the oracle games they reappear and are basically the big bad,but they only appear in the linked games,making their actual involvement in the plot rather obscure.

I think it is possible,that the series gets a second character,since uprising revived the series.And out of all kid icarus characters is the most likely choice palutena,since she is the most recurring character(aside from pit),not only in uprising,but also in the series as a whole.